Tyson can't possibly be higher than 4th on this list. Even Bowe, who was a classic underachiever, must be ranked higher than Tyson, since Bowe's 2 wins over Holyfield are more impressive than anything Tyson did in the 90's.

I'd rank the Top 4 as:
1. Lewis
2. Holyfield
3. Bowe
4. Tyson

I'd rank Holyfield higher than Lewis on a PFP list because of his work at cruiserweight.